<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
    // 满足条件，跳出循环
    for(var i=0;i<5;i++){
        if(i==3){
            break;
        }
        console.log(i);
    }
    </script>
</body>
</html>